一种光纤传感式油气探测地震检波器探头

Feasibility study on a new fiber bragg grating geophone header

高灵敏度波动和振动传感器是目前油气探测急需的关键技术之一.本文设计了一种光纤Bragg光栅(FBG)型波动和振动传感探头,分析了其工作参数和传感优势,给出了这种新型地震检波器探头结构的有限元分析结果和实验室振动测试结果.结果表明,这种检波器探头有较好的频率响应,测试性能稳定,此结构具有很高的灵敏度放大作用.

High sensitivity vibration sensor is one of the key technology in oil and gas exploration. This paper presents a new design of FBG geophone head and analyzes the principal parameters and the advantages of the sensor. The results of finite elements analysis and the lab tests of the new geophone head are compared subsequently. These results demonstrate that this geophone head is of stable and linear frequency response and the structure of the mechanical elements may increase the sensitivity of a geophone substantially.